Abstract: A method for producing a composite part. The method includes the following steps: stacking a first mat, a spacer and a second mat in a heatable mold; at least one of the mats including a continuous web of fibers impregnated with a thermosetting resin; and compressing and heating of the stack by the heatable mold, in order to polymerize the thermosetting resin. The stacking step includes the deposition, in a heatable mold, of a first and a second filtration layer, in contact respectively with the first and second mats, on the opposite side from the spacer. The filtration layers are porous to steam and relatively less porous to the thermosetting resin. During the compression and heating step steam is evacuated from the mold.

Abstract: A structural part (10) for a motor vehicle includes first (12A) and second (12B) mats, each mat comprising fibers and a resin bonding the fibers, and a separator (14) inserted between the first (12A) and second (12B) mats, the first (12A) and second (12B) mats being fixed on opposite faces of the separator (14). At least one of the first (12A) and second (12B) mats includes at least one continuous web of fibers (16), said web (16) comprising a plurality of parallel fibers bonded together by a thermosetting resin, at least part of the fibers of each web (16) having a length greater than 20 cm, in particular greater than 50 cm.